The ${q}\bar{q}$ spectra and the structure of the scalar mesons
arXiv:hep-ph/0309319 · doi:10.1063/1.1799731
Abstract
The ${q}\bar{q}$ spectrum is studied within a chiral constituent quark model. It provides with a good fit of the available experimental data from light (vector and pseudoscalar) to heavy mesons including some recent results on charmonium. The $0^{++}$ light mesons and the new $D$ states measured at different factories cannot be described as $q\bar q$ pairs and a tetraquark structure is suggested.
5 pages, to be published in the Proceedings of the "10th International Conference on Hadron Spectroscopy", Aschaffenburg, Germany, Aug. 31 - Sep. 6, 2003